21101122021102 has 32 divisors (see below), whose sum is σ = 33257638886400. Its totient is φ = 10021658745120.

The previous prime is 21101122021073. The next prime is 21101122021103. The reversal of 21101122021102 is 20112022110112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101122021103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27802353 + ... + 28551235.

It is an arithmetic number, because the mean of its divisors is an integer number (1039301215200).

Almost surely, 2^{21101122021102} is an apocalyptic number.

21101122021102 is a deficient number, since it is larger than the sum of its proper divisors (12156516865298).

21101122021102 is a wasteful number, since it uses less digits than its factorization.

21101122021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753168.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21101122021102 its reverse (20112022110112), we get a palindrome (41213144131214).

The spelling of 21101122021102 in words is "twenty-one trillion, one hundred one billion, one hundred twenty-two million, twenty-one thousand, one hundred two".